From 49d203ce0e6ec078457504f1cae4687944f1e09b Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Fri, 16 Nov 2012 17:20:01 +0000
Subject: [PATCH] -fix

---
 src/transport/gnunet-transport-wlan-sender.c | 25 +++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/transport/gnunet-transport-wlan-sender.c b/src/transport/gnunet-transport-wlan-sender.c
index e845d4862..ba09d0b6a 100644
--- a/src/transport/gnunet-transport-wlan-sender.c
+++ b/src/transport/gnunet-transport-wlan-sender.c
@@ -101,6 +101,7 @@ main (int argc, char *argv[])
   unsigned int temp[6];
   struct GNUNET_TRANSPORT_WLAN_MacAddress inmac;
   struct GNUNET_TRANSPORT_WLAN_MacAddress outmac;
+  struct GNUNET_TRANSPORT_WLAN_MacAddress mac;
   unsigned long long count;
   double bytes_per_s;
   time_t start;
@@ -142,6 +143,7 @@ main (int argc, char *argv[])
 
   pid_t pid;
   int commpipe[2];              /* This holds the fd for the input & output of the pipe */
+  int macpipe[2];              /* This holds the fd for the input & output of the pipe */
 
   /* Setup communication pipeline first */
   if (pipe (commpipe))
@@ -151,6 +153,13 @@ main (int argc, char *argv[])
 	     STRERROR (errno));
     exit (1);
   }
+  if (pipe (macpipe))
+  {
+    fprintf (stderr, 
+	     "Failed to create pipe: %s\n",
+	     STRERROR (errno));
+    exit (1);
+  }
 
   /* Attempt to fork and check for errors */
   if ((pid = fork ()) == -1)
@@ -169,7 +178,17 @@ main (int argc, char *argv[])
 	       strerror (errno));
     setvbuf (stdout, (char *) NULL, _IONBF, 0); /* Set non-buffered output on stdout */
 
-
+    if (0 != close (macpipe[1]))
+      fprintf (stderr,
+	       "Failed to close fd: %s\n",
+	       strerror (errno));
+    if (sizeof (mac) != read (macpipe[0], &mac, sizeof (mac)))
+      fprintf (stderr, 
+	       "Failed to read mac...\n");
+    fprintf (stderr,
+	     "Got mac %.2X:%.2X:%.2X:%.2X:%.2X:%.2X\n", 
+	     mac.mac[0], mac.mac[1],
+	     mac.mac[2], mac.mac[3], mac.mac[4], mac.mac[5]);				  
     radiotap = (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *) msg_buf;
     getRadiotapHeader (radiotap, WLAN_MTU);
     getWlanHeader (&radiotap->frame, &outmac, &inmac,
@@ -200,9 +219,13 @@ main (int argc, char *argv[])
   {
     /* A zero PID indicates that this is the child process */
     (void) close (0);
+    (void) close (1);
     if (-1 == dup2 (commpipe[0], 0))    /* Replace stdin with the in side of the pipe */
       fprintf (stderr, "dup2 failed: %s\n", strerror (errno));
+    if (-1 == dup2 (macpipe[1], 1))    /* Replace stdout with the out side of the pipe */
+      fprintf (stderr, "dup2 failed: %s\n", strerror (errno));
     (void) close (commpipe[1]); /* Close unused side of pipe (out side) */
+    (void) close (macpipe[0]); /* Close unused side of pipe (in side) */
     /* Replace the child fork with a new process */
     if (execlp
         ("gnunet-helper-transport-wlan", "gnunet-helper-transport-wlan",
-- 
2.25.1